We　have　developed　various　nanoinks,　including　silver　nanowires,　silver　nanoplates,　Cu-Ag　core-shell　nanoparticles,　graphene　oxide　and　graphene.　Gram　level　nanoplates　are　successfully　synthesized　through　a　polymer　controlled　hydrothermal　growth.　Core-shell　structures　are　synthesized　through　a　microwave-assisted　reduction　and　galvanic　metal　displacement.　Graphene　is　fabricated　through　laser　reduced　graphene　oxide.　We　show　that　these　inks　are　enabling　for　direct　writing　on　various　substrates.　Also,　we　displayed　high　viscous　nanopastes　can　be　developed　by　further　concentration　of　these　inks　and　metallic　nanopastes　can　be　used　for　low　temperature　packaging　of　flexible　electronics　and　power　electronics　operating　at　high　temperatures.　For　curing　printed　nanoinks　and　nanopastes,　we　compared　three　kinds　of　methods:　thermal　sintering,　photonic　sintering　with　flash　light　and　athermal　sintering　with　ultrafast　fiber　laser　irradiation.　It　is　possible　to　build　3D　structures　by　combining　ink　printing,　flash　light　nanosintering　and/or　laser　reduction.